Senior Software Engineer, Firmware

Purpose Brands, the parent company of Orangetheory, Anytime Fitness, Waxing the City, The Bar Method, and Stronger U, is seeking a Senior Software Engineer, Firmware to join our team. This is a great position for someone who is looking to expand their career and join a company with a fun, fast-paced, and inspirational culture. Purpose Brands is looking for a Senior Software Engineer to join our Edge Engineering team. In this role you will own, design, create, and maintain our connected fleet of devices. This includes our access control system (Anytime Fitness) and our connected studio experience (Orangetheory Fitness). Our systems combine custom ICs, bespoke vendor hardware, and off-the-shelf components that bring our 7000+ studios to life for our millions of global members. An ideal candidate will have a baseline of embedded engineering experience in addition to familiarity with a connected system (mobile, backend, or other very extensive hardware experience). Purpose/Impact: Duties & Essential Functions Firmware + Integration Responsibilities (60% of time) Collaborate with the broader Edge Engineering firmware, backend, QA, and lead engineers Design, write, and maintain C++ firmware code for our Access Control System Manage the integration between our hardware and backend systems Identify, design, and develop internal tools for fleet management Write and maintain our automated testing suite Write and maintain our technical documentation Hardware Responsibilities (20% of time) Work with hardware design vendors to spec and deliver new hardware revisions Write, develop, and execute acceptability and manual test plans Assist our dedicated support team in debugging intricate hardware problems globally Cross-Team Collaboration (20% of time) Become the go-to resource for answering deep technical questions on our hardware technology stack Collaborate with our hardware & SaaS vendors to maintain excellent working relationships Collaborate with our Supply Chain, Warehouse, and Provisioning teams to ensure stable product is always available Strengths and Background Required Qualifications and Experience Proven ability to set and hit commitments while maintaining technical excellence Proven ability to self-direct and organize in a fast-paced distributed collaborative environment Proficiency in writing firmware for microcontrollers (C/C++) Proficiency in multithreaded applications (mutexes/threads/pthreads/etc.) Experience in writing and integrating automated test cases (GTest, GMock, etc.) Deep knowledge in at least one "Nice-to-have" section below Nice-to-have - Extensive Hardware Over 5 years of experience developing hardware products from design to rollout Experience integrating I2C / RS485 / SPI / BLE / digital IO Deep experience with a variety of microcontrollers or projects (ESP32, nRF, Raspberry Pi / Arduino, etc.) Experience reading and debugging wiring diagrams Experience designing hardware projects end-to-end Experience reading and integrating technical specification documentation Experience working with contract manufacturers and logistics Experience with toolchains and build chains (CMake/linkers/etc.) Proven ability debugging intricate hardware problems at global scale Nice-to-have - Extensive Backend Over 5 years of experience delivering real-time connected backend systems Experience developing cloud-native backend applications (.NET/Java/Kotlin/other) Experience developing and integrating microservices Experience developing and integrating AuthZ/AuthN/OAuth2 Experience managing certificates and working with cryptographic tools (TLS certificates, OpenSSL CLI, X509 certificates, asymmetric and symmetric keys, etc.) Experience with Infrastructure as Code (Terraform/CDK/other) Experience developing build systems and/or managing CI/CD (GitHub Actions, TeamCity, etc.) Nice-to-have - Mobile Experience in mobile development (iOS or Android or both) Experience interfacing with microcontroller BLE in Peripheral and Central modes Ex…

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